Clock generator with spread spectrum — what it does for your board
The W181-53GT is a single-circuit clock/frequency synthesizer with an integrated PLL and spread spectrum clock generation capability. It accepts a clock or crystal input and delivers a CMOS output up to 75 MHz. The spread spectrum modulation spreads the output energy across a wider frequency band, reducing peak EMI emissions — useful for passing radiated emissions testing in consumer and office equipment without adding ferrite beads or shielding. The part operates from either a 3.135 V to 3.465 V rail or a 4.5 V to 5.5 V rail. The 1:1 input-to-output ratio means one clean clock in, one spread-spectrum clock out. Temperature range is 0°C to 70°C, which covers commercial indoor environments — office equipment, appliances, test gear, and similar controlled-climate PCBs. Not rated for industrial or automotive ambient extremes.
75 MHz maximum — where it fits in the clock tree
75 MHz is the top output frequency. That covers most microcontroller clock inputs, USB full-speed reference clocks, and general-purpose logic timing.
Lifecycle and sourcing posture
That makes it suitable for both new designs and ongoing production replenishment.
Package and mounting
Housed in an 8-pin SOIC package (8-SOIC, 0.154" body width, 3.90 mm), surface-mount. The supplier device package is also 8-SOIC. No special footprint considerations beyond standard SOIC-8 land pattern.